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How much will you remember?

There is a commonly passed around "stat" that, according to a blog post I recently read, isn't true. You've probably seen it or heard it.

It is said that people remember:

10% of what they read

20% of what they hear

30% of what they see

50% of what they see and hear

70% of what they write and say

90% of what they say as they do

The blog author says:

Quite where these numbers come from is a mystery to many, and indeed it is difficult to understand what 90% retention actually means… 90% of what for how long? As a model it looks and on first thought appears to be credible, however as many of us will know some people have almost 100% retention for a considerable period of time if they read something, others teach others from a structure or procedure which they themselves do not understand!

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